Specifications

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Chapter 13: Topology – Network Services
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Alcatel-Lucent Enterprise Communication Solutions
April 2014 Offer
Homogeneous networks may consist of Alcatel-Lucent OmniPCX Enterprise Communication Server
R10.0 nodes only, or may include nodes of Alcatel-Lucent OmniPCX Enterprise Communication
Servers R10.0, R9.0, R8.0, R8.0.1 and R7.1.
If in the customer network, some nodes run in releases under 9.0, a smooth transition is still possible
by interconnecting nodes in different versions during a controlled migration period. During this
specific period, in a same homogeneous network, for instance, you can have a node in release 8.0.1
and another one in R10.0.
This allows customers to migrate on a node-by-node basis without compromising existing services or
features.
Restrictions on features
When a new ABC-F2 service is introduced in a software release, this service can only be handled on a
system with the same software release level (“end-to-end service”). However, due to the “message
transparency” service included in the ABC-F2 protocol, nodes running a lower level of software
release can route new messages.
Implementing “disallowed” configurations can lead to poor VoIP quality because of voice
compression/decompression cycles. Guidelines are available to build a VoIP solution that ensures the
best possible voice quality and interactivity to voice communication over an IP network.
3.1.1 Private network configurations and scalability
Supranetwork (More than 100 Nodes)
Several homogeneous Alcatel-Lucent OmniPCX Enterprise Communication Server networks can be
linked together in an extended configuration called a “supranetwork.” In a supra-network,
homogeneous networks (made of 1 to 100 nodes) are linked together through a TDM ABC-F Trunk
Group or an IP ABC-F Trunk Group.
An ABC-F Trunk Group will be used instead of an ABC link to:
– Answer scalability requests (above 100 nodes or above 100 000 terminals in a sub-
network; up to 250 sub-networks)
– Cope with customer requirements in terms of organization or/and numbering plan:
Each sub-network can be fully managed independently.
The numbering plan can be homogeneous or heterogeneous.
If the ABC-F (Features), ABC-M (Management) and Virtual Services are carried by an ABC link, only
ABC-F is carried by an ABC-F Trunk-Group. So, in a supra network, homogeneous networks are
managed independently and the applications (e.g., Voice Mail) are centralized at the level of each
homogeneous network.
In a supra-network, each homogeneous network retains its own external connections and attendants.
Therefore, one of the advantages of this configuration is that a large company with an international
scope can have an enterprise-wide network while maintaining local connectivity to the PSTN.